PHP生成缩略图实例讲解_php实例_

= $scale) { //创建真彩图像资源（imagecreatetruecolor()函数使用GDLibrary创建新的真彩色图像） $newimg = imagecreatetruecolor($thumbWidth, $thumbHeight); //图像处理 imagecopyresampled($newimg, $sourceImg, 0, 0, 0, 0, $thumbWidth, $thumbHeight, (($height) * $scale), $height); //以JPEG格式将图像输出到浏览器或文件 ImageJpeg($newimg, $thumbSrc); } //宽度优先 if ($ratio < $scale) { $newimg = imagecreatetruecolor($thumbWidth, $thumbHeight); imagecopyresampled($newimg, $sourceImg, 0, 0, 0, 0, $thumbWidth, $thumbHeight, $width, (($width) / $scale)); ImageJpeg($newimg, $thumbSrc); } } else { if ($ratio >= $scale) { $newimg = imagecreatetruecolor($thumbWidth, ($thumbWidth) / $ratio); imagecopyresampled($newimg, $sourceImg, 0, 0, 0, 0, $thumbWidth, ($thumbWidth) / $ratio, $width, $height); ImageJpeg($newimg, $thumbSrc); } if ($ratio < $scale) { $newimg = imagecreatetruecolor(($thumbHeight) * $ratio, $thumbHeight); imagecopyresampled($newimg, $sourceImg, 0, 0, 0, 0, ($thumbHeight) * $ratio, $thumbHeight, $width, $height); ImageJpeg($newimg, $thumbSrc); } } //销毁图像 ImageDestroy($sourceImg); } ?>